Pope Leo XIV will preside at the Commemoration of Martyrs and Witnesses of the Faith in the 21st century, which will take place on 14 September in the Basilica of Saint Paul Outside-the-Walls in Rome.

According to the Vatican calendar, the commemoration will specifically honour those who have died for their Christian faith in the 21st century. It will include not only Catholics but also members of other Christian traditions who, in various parts of the world, have suffered persecution, violence or death because of their witness to Christ.